Integral cam-shaft bearing



June 3, 1930. A. E. L. CHORLTON 1,761,872

INTEGRAL CAM SHAFT BEARING In M N n WITNESS. v v INVENTOR A.E.I..Chor|1'on mam ATTORNEY June 3, 1930. A. E.. L. CHORLTON INTEGRAL CAM SHAFT BEARING Filed March 21, 1928 5 Sheets-Sheet 2 INVENTOR A -E.L-Chorl 6E, as, M

ATTORNEY June 3, 1930.

A. E. LICHO RLTON INTEGRAL CAM'SHAFT BEARING Filed March 21, 1928 3 Sheets-Sheet 5 x A v h Ill/l/I/l/l/l/l/l/l/l/l/A WITNESS INVENTOR A.E.l .chorlfon ATTORNEY Patented June 3, 1930 UNITED STATES ALAN ERNEST LEOFRIC GHOBLTON, OF LONDON, ENGLAND INTEGRAL CAM-SHAFT BEARING i Annlication. filed March 21,1928. Serial No. 268,420.

My invention'relates to engines, more particularly to engines of the Diesel or compression-ignition type and it has for its object to provide improve means for housing and supporting the cam shaft.

- In my Patent, No. 1,720,510, patented July 9, 1929 I have disclosed and claimed an improved engine frame of the cast, cellular type. In my application, Serial No. 291,535, filed July 10, 1928, I have disclosed and claimed individual cylinder heads carrying valve and valve-actuating devices, such heads being provided with depending push rods to be actuated bya suitable cam shaft. In accordance with the present invention, I provide a cam shaft arranged adjacent to the cylinder'heads and a cellular cast frame having integral'top and side plates, one of the side plates having integral wall elements providz o ing a chamber for the cam shaft.

This and other objects are effected by. my invention as will be a parent from the fol lowing description an claims taken in connection with the accompanying drawings, forming a part of this application, in which:

Fig. 1 isa view partly in elevation and partly in section showing an engine provided with my improved cam shaft housing;

Fig. 2 is a view partly in elevation and partly in transverse section of apparatus shown in Fig. 1, the portion in section being taken on a line passing through the center of any one of the cylinders; and,

'Fig. 3 is a transverse detail view showing the cylinderhead structure as carried by the upper portion of the engine frame together with the engine cam shaft and valve gear.

Referring now to the drawings more in detail, in Figs. 1 and 3, I show an internal combustion engine, at 10, provided with cylinder liners 12 for pistons 13 connected by rods 14 to a crank shaft 15 carried by the frame. Cylinder heads 16 are carried by the frame, the heads being provided with suitable admission and exhaust valves 17 and 18, respectively, these valves bein actuated by suitablemechanism indicated generally at 20, the mechanism having depending push rods 21 -and 22.

The cast frame 11 is made up of side plates -23 and 24, Figs. 1 and'2, which are integral with transverse plates 25, the side plates 23 and 24 and the transverse plates 25 beingintegral with a top plate 26. tially parallel to the top plate portions 27 arrange in the cells provided by the integral side and transverse plates. The top plate 26 is provided with liner-receiving openings 28 and each liner receiving opening is aligned with an opening 29 provided in a plate member 27. The cylinder liners 12 are arranged in the aligned openings 28 and 29. As pointed out in my application Serial No. 40,926, filed July 1, 1925, hereinbefore referred to, the transverse members 25 are preferably provided with late 26, there are Disposed substanarch bar constructions 31 for supporting the crank shaft 15.

plate 24 and with the top plate 26, the hous- I ing so formed being prpvided with openings 37 in .the top thereof, such openings preferably being arranged in the top plate 26. The cylinder heads 16 extend laterally sufiiciently with respect to the top plate 26' so that the push rods 21 and 22, Fig. 1, may depend through the openings 37, suitable sleeves'38 extending through the openings and into the cylinder heads 16, these sleeves serving as guides for the lower ends of the push rods.

As maybe seen from Fig; 1 the housing provided by'the wall portions 35 and 36 integral with the side plate 24 and with the top plate 26 is provided with interior bearings 40 distributed interiorly of the housing, there preferably being a bearing for each cylinder. As may be seen from Fi 1, the cam shaft is provided with a pair 0 cams for each cylinder head, the cam 41 cooperating with the push rod 21 and the cam 42 cooperating with the push rod 22. The bearings 40 are preferably arranged between the and 42.

pairs of cams 41 to avoid bolt holding either cam shaft arrangement.

that I have provided an improved engine frame construction which has a low ratio of weight to power developed and which is resistive to deflection, either transversely or torsionally. In order that a frame of this character may be provided and support all rotary parts of the engine, it is desirable that the cam shaft shall be carried by the frame without special attaching means. By having the wall portions the cam shaft chamber .side plate 24-and with the top plate 26, it is 35 and 36 providing 32 integral with the assured that the cam shaft may be-adequately supported by the engine frame without providing special attachment means for carrying the cam shaft. In'this way, it is possible openings in the side plate for a cover or bearings forthe cam shaft. In addition to the structure being stronger and not sacrificing the strength of the side plate '24 due to special attachment means, the structure provides for total enclosure of the cam shaft, the arrangement of the cam shaft'adjacent to-the cylinder heads, and the provision of means whereby all of the push rods are enclosed. It will, therefore, be seen that my improved engine is characterized by the fact that all of the operating parts are totally enclosed, this result being due in a large measure to the special While I have shownmy invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are spe-,

cifically set forth in the appended claims.

What I claim is:

1. In an internal combustion engine, frame including integral side and top plates and cylinders supported near their 'top'portions by the top plate, one 'of the side plates having integral wall members provid- 1n pa i allel with the top'plate.

2. Inan internal combustionengine, a cast frame including integral side and top plates and cylinders supported near their top portionsby the-top plate, one of the side plates having integral wall members providin a cam shaft housing adjacent to and para el with the'top' plate, bearings arranged interiorly-of the housing, and a cam shaft carried by the bearings.

3. In an internal frame including integral side and top plates and cylinders supported near their top portions by the top plate, one of the side plates havingintegral wall members providing a cam shafthousing adjacent to and parallel with the top plate, said housing having 0 enings at the upper side thereof, a cam s aft provided with a plurality'of push rods,

.ing having a through which a casta cam shaft housing adjacent to and combustion engine, a cast.

arranged interiorly of the housing and having cams aligned with the openings, and cylinder heads carried by the frame and provided with valve-actuating push rods extending through the openings for cooperation with said cams.

4. In an internal combustion engine, a cast frame including integral side and top plates and cylinders supported near their top portions by the top plate, one of the side plates having integral wall members providing a cam shaft housing adjacent to and parallel with the top plate, said housing havin pairs of openings in the upper portion thereof, bearings arranged interiorly of the housing and being located respectively between the openings of each pair, a cam shaft journaled in the bearings and having cams aligned with the openings, and cylinder heads carried by the top plate, each cylinder head being provided with a p ir of valve-actuating push rods extending t irough the openings and cooperating with said cams.

.5. In an internal combustion engine, a cast frame having integral side and top plates and cylinders supported near their top portions by the top plate, one of the side plates having integral walls providing a cam shaft housing February, 1928. I

. ALAN ERNEST LEOFRIC CHORLTON.

f, I have hereunto subtwenty-fourth day of 

